docs: document that OOO-decls is now supported

Fixed: tint:1266
Change-Id: Ib78038bdf63dfeae6c2e328213560c37df41eb81
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/80520
Auto-Submit: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: James Price <jrprice@google.com>

docs/origin-trial-changes.md

diff --git a/docs/origin-trial-changes.md b/docs/origin-trial-changes.md
index 8045445..71be910 100644
--- a/docs/origin-trial-changes.md
+++ b/docs/origin-trial-changes.md
@@ -8,6 +8,10 @@
 * The `ignore()` intrinsic has been removed. Use phoney-assignment instead: `ignore(expr);` -> `_ = expr;`.
 * `break` statements in `continuing` blocks are now correctly validated.
 
+### New Features
+
+* Module-scope declarations can now be declared in any order. [tint:1266](crbug.com/tint/1266)
+
 ## Changes for M99
 
 ### Breaking changes